Fuel mixer



Patented Feb. 3, 1931 UNITED STATES PATENT cerros JOSEPH SLADKY AND ALEXANDER C. SLADKY, OF,MILWAUKEE, WISCONSIN, ASSIGN- ORS TO NATIONAL ENAMELINGEG STAMPING COMPANY, INC., OFMILWAUKEE, WIS- CONSIN A Application filed February 18, 1929.

This invention relates to new and useful limprovements in fuel mixers.

One of the objects of our invention is the provision of a fuel mixing device adapted to be used in connection with liquid fuel burners and to be positioned within the liquid fuel supply tank whereby to provide for a mixture of fuel and air as the fuel is drawn from the tank to the burner.

Another and very important object of our invention is the provision of a mixing device which will create a mixture of air and gasoline or other liquid fuel at a constant rate so that the mixture will burn with a steady flame k at all times. v

A further object of our invention is the provision of a liquid fuel mixer which employs the principle of the venturi wherein the air pressure utilized will at the throat of the venturi increase in velocity and decrease in pressure so that when the air comes into contact with the liquid fuel it will readily mix therewith and the increased velocity will have a tendency to create a steady and constant flow of the liquid fuel to create an even mixture and a steady flow of the fuel to the burner.

A still further object of our invention is the provision of a fuel mixture which is so 3o constructed and arranged that it may be read ily used in connection with liquid fuel supply tanks of various types and can be quickly and easily connected to liquid fuel burners of various types.

With the above and other objects in view, the invention consists in the novel features of construction, the combination and arrangement of parts hereinafter more fully set forth, pointed out in the claim and shown l@ in the accompanying drawing wherein:

7e have illustrated our improved liquid fuel mixer in position within a liquid fuel supply tank 1, the tank 1 is provided with the usual opening having an internally threaded collar 2 fitted within the opening and retained in position by the annular flange 3.

Threaded into the collar 2 is a fitting 4 which is used for connecting the mixing device with the burner through the medium of l the conduit 5,. The inner end of the fitting is 'the tube 13 terminating `at the throat of the FUEL MIXER Serial No. 340,992.

' tube 10. This tube 10 is somewhat smaller in diameter than the tube 7 so as to provide the air chamber 11 and the inner end of the tube 7 is formed with a reduced collar l2 embrac-v 65 ing the tube 10 adjacent its lower end to close the lower end of-the air chamber 11.

Arranged within the tube 10 at its lower end is the fuel-feeding tube 13, the lower end of v which extends downwardly below the lower end of the tube l() toward the bottom of the tank 1. This tube is held in position by means of the reduced collar 111 on the lower end of the tube 10 and embracing the tube 13. This structure not only retains the tube 13 in position but closes the lower end of the tube 10.

' At the intermediate portion of the tube 10, i a venturi 15l is formed with'the inner end of 8o venturi which leaves a very small space between the end of the tube13 and the walls of the tube 10; The tank 1 contains not only the liquidfuel but air under pressure above the fuel and as this air under pressure is usually at the top of the tank, the tube 7 is provided with inlet openings 16, admitting air to the chamber 1l. This air passes downwardly into the'chamber and through openings 17 in the tube 10 near the inner end thereof, the air passing into the mixing tube 10 and upwardly through the venturi 15. It will be lnoted that the air when passed through the steady mixture as the fuel is delivered tothe burner.

With the use of this improved mixing device, it will be apparent that When the control valve to the burner is opened and fuel drawn from the tank 1, the action of the Venturi throat Will result in a lean mixture being delivered to the burner When the fuel is ignited. This lean mixture delivered to the burner at the beginning of the delivery of fuel to the burner, is due to the fact that When the burner valve is first opened there is more air sucked out through the mixing tube 10, than gasoline, but as the suction Continues and the fuel is drawn up through the tube 13, the mixture Will increase in its richness in gasoline, thus as the burning continues, the gasoline richness increases, providing a hot steady flame With very little loss of air from the tank 1.

Due to the arrangement of the venturi 15, the air When passing through the venturi Will have its velocity increased and the pressure decreased as compared With the pressure in the remainder of the tube and in the tank.

It Will be apparent from the foregoing' that We have provided an extremely simple liquid fuel mixing device Which can be quickly and easily attached to the fuel supply tanks of liquid fuel burners and wherein the device provides a mixture of air and liquid fuel at a constant rate so that the mixture Will burn with a steady flame at all times.

We claim:

In a fuel mixer, a fitting having longitudinal bores, an externally threaded portion at one end of the fitting and an enlarged bore Within the threaded part, a tubular portion at the outer end of the threaded part forming a continuation of the bore, a tubular member having one end fitted over the tubular portion, a second tubular member Within the first member having its one end extending into the enlarged bore, a reduced collar on the first tube adapted to embrace the second tube adjacent its outer end, a venturi Within the second tube intermediate its ends, a fuel feeding tube leading into the second Vtube With its inner end positioned at the venturi and a reduced collar on the second tube embracing the fuel feeding tube adjacent its outer end.

In testimony that We claim the foregoing We have hereunto set our hands at @Milwaukee7 in the county of Milwaukee and State of Wisconsin.

JOSEPH SLADKY. ALEXANDER C. SLADKY. 

